I have the same phone . I use Photoshop to crop them to 220x176 or 240x 320 you have to play with it . Somtimes one looks better than the other depending on what the picture is.

how do i set my own pictures from the micro sd card to wallpaper that fills the whole screen? everytime i try it just cuts off the top and bottom and only shows part of my picture. when you use the camera on the phone and make wallpapers it makes it strech to fit the screen! thanks for the help